I was sent a reduction to the 26 yard line but did not receive it until after I had competed in a shoot at the 27. At that shoot, I shot well enough to get a 1/2 yard punch and the ATA Shooter Info Center now puts me at the 26.5 yard line.

Question - When does (did) the reduction take place and did I shoot from the wrong yardage and therefore need to forefit any option money I may have won?

If you shot from the 27 and earned a punch, the reduction is void. I can't quote the exact rule but there is a section in the book which speaks of this situation. The Shooter Information Center is faster than the mail. When the scores from your last shoot reach the ATA office, the SIC will be corrected.

Eric- The reduction becomes effective when you receive it in the mail. You shot from the 27 before you received the reduction and that was your proper yardage. You earned yardage on the 27 before you received the reduction and that nullified the offered reduction. Your correct yardage is 27. Call the ATA office and ask for Kathy. This can quickly be resolved.